4.7 Article

Modeling study of two-stage, multi-bed air cooled silica gel plus water adsorption cooling cum desalination system

期刊

APPLIED THERMAL ENGINEERING
卷 114, 期 -, 页码 704-712

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2016.12.011

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Cooling cum desalination; Silica gel; Simulation; Two-stage adsorption; Water

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This paper presents a transient numerical study of two-stage, air-cooled silica gel + water adsorption system producing cooling and potable water. The key aspect of the present study is an attempt to model the inter-stage pressure dynamics when two beds exchange mass in terms of vapors across the stages. This is an important improvement over prior models wherein the inter-stage pressure was assumed to be either constant or user input. Furthermore, the evaporator and condenser pressures are also allowed to vary in this study in contrast to the previous papers. The simulation results are compared with the experimental data for various cycle times and chilled water inlet temperatures in the range of 11.5-20.0 degrees C, while having the heat source temperature fixed at 85 degrees C and air temperature at 36 degrees C. Depending on the chilled water inlet temperature and cycle time, the SCC is found to be between 2 and 7 Rton/tonne of silica gel; SDWP ranges within 0.3-0.9 m(3)/day/tonne of silica gel and COP varies between 0.05 and 0.26. (C) 2016 Elsevier Ltd. All rights reserved.

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